Hello, I have no idea on how to solve this question below. Could you please explain the right answer for me?Thank you so much^^

WALL-E Spacelines has two types of passengers who fly round-trip between Earth and Mars. Half of the passengers are willing to pay 400 for this trip if they do not have to stay over on a Saturday (SAT) night and 300 if they do have to stay over on a Saturday (SAT) night. The other half of the passengers are willing to pay 200 regardless of whether or not they must stay over on a Saturday (SAT) night. WALL-E Spaceline's marginal cost of a seat is 0. Among the following pricing policies, the one that yields the largest profit is: O Charge 200 for all tickets O Charge 200 for SAT restricted tickets and 400 for unrestricted tickets O Charge 300 for SAT restricted tickets and 400 for unrestricted tickets O Charge 200 for SAT restricted tickets and 299 for unrestricted tickets O Charge 199 for SAT restricted tickets and 400 for unrestricted tickets